The MMR vaccine protects against measles, mumps, and rubella (German measles). MMR vaccinations are given by injection in two doses. The first is administered at age 12 to 15 months; the second generally is given at age 4 to 6 years.

Why the Vaccine Is Recommended

Measles, mumps, and rubella are infections that can lead to significant illness. More than 95% of children receiving MMR will be protected from the three diseases throughout their lives.

Possible Risks

When to Delay or Avoid Immunization

if your child is currently sick, although simple colds or other minor illnesses should not prevent immunization

if your child has an allergy to eggs, gelatin, or to the antibiotic neomycin that has required medical treatment

if your child has recently received gamma globulin or a blood transfusion

if your child has immune system problems related to cancer

if your child is taking prednisone, steroids, or other immunosuppressive drugs

if your child is undergoing chemotherapy or radiation therapy

Caring for Your Child After Immunization

If a rash develops without other symptoms, no treatment is necessary and it should resolve within several days. Pain and fever may be treated with acetaminophen or ibuprofen. Check with your doctor about the appropriate dose.